As I remarked in 1963 this species seems quite closely related to Platyrhacus andersonti Pocock and P. moebiusi Attems, treated above as synonyms. An other related species may be P. kelantanicus Sinclair. It does not seem impossible that Rhyphodesmus drurii was introduced into Guyana from southern Burma or the Malayan Peninsula. It may be located in this area sooner or later. On the other hand, as far as information is available, the recorded Guyana localities do not all seem to be typical synanthrope sites, and uncertainty about the status of drurii remains.